package PTA;

import java.util.Scanner;

public class Main1 {
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		while(true){
			int a = in.nextInt();
			int b = in.nextInt();
			if(Math.abs(a)>1000)
				System.out.println("a<=1000");
			else
				System.out.println(a+b);
		}
		
		
	}
}
